Exploring the capabilities of active grids

L Neuhaus, F Berger, J Peinke, M Hölling - Experiments in Fluids, 2021 - Springer
Active grids are commonly used in wind tunnels to generate turbulence with different
characteristic features. In contrast to the common objective to generate turbulence with a …

[HTML][HTML] A novel approach for artificially generating horizontal wind gusts based on a movable plate: The paddle

JN Wood, M Breuer, T Neumann - Journal of Wind Engineering and …, 2022 - Elsevier
The paper is concerned with a novel approach to generate horizontal wind gusts in classical
wind tunnels. Assuming an open test section of an Eiffel-or Göttingen-type wind tunnel, the …

Model-free control of the dynamic lift of a wind turbine blade section: experimental results

L Michel, I Neunaber, R Mishra, C Braud… - Journal of Physics …, 2022 - iopscience.iop.org
This work addresses the problem of developing control algorithms for the control of the
aerodynamic lift of wind turbine blades using air injection, taking into account disturbances …

Unsteady flow generation in a wind tunnel using an active grid

A Azzam, P Lavoie - Experiments in Fluids, 2023 - Springer
Unsteady flows are pervasive in nature and engineering applications, such as unmanned
aerial vehicles and wind turbines. Simulating these flows in an experimental setting is …

[HTML][HTML] Developing a digital twin framework for wind tunnel testing: validation of turbulent inflow and airfoil load applications

R Mishra, E Guilmineau, I Neunaber… - Wind Energy …, 2024 - wes.copernicus.org
Wind energy systems, such as horizontal-axis wind turbines and vertical-axis wind turbines,
operate within the turbulent atmospheric boundary layer, where turbulence significantly …

How to design a 2D active grid for dynamic inflow modulation

TTB Wester, J Krauss, L Neuhaus, A Hölling… - Flow, Turbulence and …, 2022 - Springer
In free-field operation, many aerodynamic systems are confronted with changing turbulent
inflow conditions. Wind turbines are a prominent example. Here, the rotation of the rotor …

Experimental assessment of a blended fatigue‐extreme controller employing trailing edge flaps

S Bartholomay, S Krumbein, S Perez‐Becker… - Wind …, 2023 - Wiley Online Library
This paper presents an experimental assessment of a blended fatigue‐extreme controller for
load control employing trailing edge flaps on a lab‐scale wind turbine. The controller blends …

Wind tunnel study: is turbulent intensity a good candidate to help in bypassing low Reynolds number effects on 2d blade sections?

R Mishra, I Neunaber, E Guilmineau… - Journal of Physics …, 2022 - iopscience.iop.org
Wind turbines operate in the turbulent atmospheric boundary layer and can be additionally
exposed to the wakes of upstream wind turbines. Hence the inflow encountered by wind …

[HTML][HTML] A numerical method to mimic an experimental wind gust generator: The immersed boundary gust generator

K Boulbrachene, M Breuer - Physics of Fluids, 2024 - pubs.aip.org
To generate horizontal wind gusts in a classical wind tunnel, Wood, Breuer, and Neumann
[A novel approach for artificially generating horizontal wind gusts based on a movable plate …

[HTML][HTML] Experimental and numerical simulation of extreme operational conditions for horizontal axis wind turbines based on the IEC standard

K Shirzadeh, H Hangan, C Crawford - Wind Energy Science, 2020 - wes.copernicus.org
In this study, the possibility of simulating some transient and deterministic extreme
operational conditions for horizontal axis wind turbines based on the IEC 61400-1 standard …